Split pulley



No. 749,756. I PATENTED JAN. 19, 1904. s. STROBA.

SPLIT PULLEY.

APPLICATION FILED JULY 29, 1903,

H0 MODEL.

flaw/ 7770 1? W 035% UNITED STATES Iatented January 19, 1904.

SAMUEL STROBA, OF ALLEGHENY, PENNSYLVANIA.

SPLIT PULLEY.

SPECIFICATION forming part of Letters Patent N0. 749,756, dated January19, 1904. Application filed July 29, 1903. Serial No. 167,442. (Nomodel.)

To all whom it may concern:

Be it known that I, SAMUEL STROBA, a citizen of the United States ofAmerica, residing at Allegheny, in the county of Allegheny and State ofPennsylvania, have invented certain new and useful Improvements in SplitPulleys, of which the following is a specification, reference being hadtherein to the accompanyin g drawings.

This invention relates to certain new and useful improvements in splitpulleys, and relates more particularly to that class of pulleys whichare adapted to be parted in order that they may be placed upon a shaftat any point without reference to the ends of the shaft; and it has forits object to provide a pulley both halves of which may be cast from thesame pattern.

My invention further aims to provide the halves of the pulley withinterlocking parts both at the hub and rim portions of the pulley,thereby assuring safety, strength, and durability; furthermore, toprovide a pulley that will be extremely simple in its construction,comparatively inexpensive to manufacture, and highly efficient in itsuse.

' With the above and other objects in View my invention consists in thenovel construction, combination, and arrangement of parts to behereinafter more particularly described, and specifically pointed out inthe claim.

In describing the invention in detail reference is had to theaccompanying drawings, forming a part of this specification, and whereinlike numerals of reference indicate like parts throughout the severalviews, in which.

Figure 1 is a side elevation of my improved split pulley, showing theinterlocking halves connected together. Fig. 2 is a similar view of oneof the halves. thereof. interlocking half.

In the drawings the reference-numeral 1 represents the one half of thepulley, and the other or interlocking half is denoted by the numeral 2.The rim portion of the pulley is enlarged at the joint, as shown at 3,and provided with a tongue 4, and a corresponding groove 5 is formed inthe other half. Each half of the pulley is provided with a tongue Fig. 3is a front view- Fig. 4 is a side elevation of the other and groovewhich extends in opposite directions. Each half of the hub 6 carries adovetail 7 having a straight face 8. The halves of the hub have formedtherein corresponding openings 9 to receive the dovetails. A set-screw10 extends through the hub, and I may place two or more set-screws inthe hub in order to maintain the concentric relation of the pulley tothe shaft.

It is to be noted that the upper and lower faces of the tongues 7 arecurved or somewhat concave, while the side walls of the grooves 9 areconvex to conform thereto. The tongues A are substantially in the formof a half-dovetail, and as one tongue iand one tongue 8 is formed oneach section, together with one groove 9 and one groove 5, it will beobserved that the same mold may be employed for casting the sections.

The manner of connecting and disengaging the halves will be readilyapparent from the foregoing description, taken in connection with theaccompanying drawings.

It will be noted that various changes may be made in the details ofconstruction without departing from the general spirit of my invention.

Having fully described my invention, what I claim as new, and desire tosecure by Letters Patent, is

A split pulley comprising a hub, rim, and connecting-spokes, and beingformed in two sections, each section having one end of its rim formedwith an enlargement extending beyond said end, said extended portion ofsaid enlargement being formed with a groove, tongues formed on the innerfaces of the opposite ends of said rim-sections adapted to fit into thegrooves of the adjacent enlargements, and

i dovetail extensions, one being carried by each hub-section and saidextensions being received in correspondingly-shaped grooves formed inthe opposite sections.

In testimony whereof I affix my signature in the presence of twowitnesses.

SAMUEL STROBA.

Witnesses:

H. C. EvER'r, K. H. BUTLER.

